When a user replies, they can simply refresh the page afterwards and it will repost their reply. I believe the URL contains the code that does this. I noticed this issue when A user made 50 reposts of the same post.
The reason of why my website benefits from reloads is because it is highly trafficked, I have over 300 authors that is using your plugin... I hope you understand why this is an issue in this scenario.
Nonetheless, cheers for the plugin, very handy for us.